﻿function showLocation(a)
{
    var txt;
    var nav = GetNavigatorVersion();
    var oSpan;
    var oLocSpan;
    oSpan = a.lastChild;
    oLocSpan = document.getElementById('currentLocation');
    
    if(nav == 0){    
        txt = oSpan.parentNode.innerText;
        oLocSpan.innerText = "-> " + txt;    
    }else{
        txt = oSpan.innerHTML;
        oLocSpan.innerHTML = "-> " + txt;
    }
}

function GetNavigatorVersion()
{
    var Sys = {};
    var ua = navigator.userAgent.toLowerCase();
    var s;
    (s = ua.match(/msie ([\d.]+)/)) ? Sys.ie = s[1] :
    (s = ua.match(/firefox\/([\d.]+)/)) ? Sys.firefox = s[1] :
    (s = ua.match(/chrome\/([\d.]+)/)) ? Sys.chrome = s[1] :
    (s = ua.match(/opera.([\d.]+)/)) ? Sys.opera = s[1] :
    (s = ua.match(/version\/([\d.]+).*safari/)) ? Sys.safari = s[1] : 0;

    //以下进行测试
    if (Sys.ie) return 0;
    if (Sys.firefox) return 1;
    if (Sys.chrome) return 2;
    if (Sys.opera) return 3;
    if (Sys.safari) return 4;
}
